In a sharp attack at the BJP-led government, Rajya Sabha MP Kapil Sibal on Monday said the present establishment does not realise that erasing diversity is an "anti-historical" move and will lead to tensions. Delivering the 4th Memorial Lecture in honour of M P Veerendra Kumar, Sibal talked about the idea of India and its evolution at length. "Why do we talk about the idea of India? It is because most of us do not understand the birth of this great nation. If you ask me, a nation is comprised of so many facets which are embedded in its history. Unless you understand the history of a nation and its genesis over centuries, you will never be able to understand what the nation is all about," Sibal said. "In order to understand what a country stands for you must understand how it evolved over centuries and once you understand that, you realize what India is all about," the former Congress leader said. The idea of India has evolved over centuries, he asserted. "Why is it that we are suc